Example of collection of all layers and GeoJSON generation from Geoman

[VlasovAlexey]

First of all, thanks for Geoman! It is convenient and efficient. Unfortunately, my level of JS knowledge is not enough to do data saving from Geoman to GeoJSON. I found a good example of how to do it from Leaflet.Draw here:
https://github.com/anshori/leaflet-draw-to-geojson-file.
As I understand it, this uses an event from Leaflet.Draw to generate (get?) features (drawn items?), then it all gets collected into a layer, after which you can generate drawnItems.toGeoJSON()).
I can't reproduce this as I don't understand how events work in Geoman. And I don't understand how events work at all :) Alas, I need a simple example how to collect information from all layers accessed in Geoman and make a GeoJSON text (xml?) out of it. Could someone please make such an example?
p.s. I don't know if this will be of interest, but I'm working on a web application for cave divers. It's very specific and is almost done
https://github.com/VlasovAlexey/Minotaur
In practice, the only thing I need to do is save. Well, and a dozen other simple things without a good knowledge of object-oriented programming. It will already be simple and I can do it :)
I would be very grateful for any help with an example of saving geomantic data to GeoJSON. If you want, I will gladly add you to the founders.

[VlasovAlexey]

Sorry i think found solution:
#1342

function toGeoJSON() {
      var allLayers = new L.featureGroup();
      map_editor.eachLayer(function (layer) {
        if (layer instanceof L.Path) {
          allLayers.addLayer(layer);
        } else {
          if (layer instanceof L.Marker) {
            allLayers.addLayer(layer);
          }
        }
      });
      var geojson = allLayers.toGeoJSON();
      console.log(geojson);
    }
toGeoJSON();

[Falke-Design]

You can also use the Geoman method map.pm.getGeomanLayers(true).toGeoJSON() https://geoman.io/docs/leaflet/modes/draw-mode

PS: When your project is finished, you can add it to the Showcases. As a visitor it would be nice to see some previews / images in your Readme file 😉